Originally Posted By: another Todd
If you must drill it, I too recommend cobalt (even HF cobalt bits are decent enough)for anything metal. They just last and last, especially in a drill press where we impatient types tend to muscle through the metal.
Update, I bought cobalt bits from Amazon, ($1.78 each). Took 2 bits to drill 8 5/32" holes. Really hard rails. Found out why the slats kept falling out, the rails would rotate up to 30* under load, mostly when a heavy person rolled over. Because of this springiness, I am locking the slats down to the rails with nuts and washers.